ABSTRACT
Objective To explore the cell viability in the ablation area of thyroid nodules at 6 months after microwave ablation by enzyme histochemical staining. Methods Twenty-four ablation areas of thyroid nodules were selected from 20 patients who underwent histopathological assessment of the ablation area by core needle biopsy at 6 months after microwave ablation between Dec. 2017 and Sep. 2018. Core needle biopsy was performed at the central and marginal regions of the ablation area with a cutting biopsy needle. The specimens were obtained and placed in liquid nitrogen to make frozen sections. Enzyme histochemical staining was used to detect the activities of succinate dehydrogenase (SDH) and nicotinamide adenine dinucleotide phosphate diaphorase (NADPH-d), and the difference of cell morphology and histological structure was compared with H-E staining results. Results The specimens of the central and marginal regions of 24 ablation areas were successfully obtained. The histochemical staining of SDH and NADPH-d in the central region of ablation area had good consistency, and the negative rates were both 95.83% (23/24). The histochemical staining of SDH and NADPH-d in the marginal region of ablation area also had good consistency, and the negative rates were both 91.67% (22/24). H-E staining of 23 central regions and 22 marginal regions showed pink amorphous mass of necrosis. H-E staining of 1 central region and 2 marginal regions showed partly necrotic and fibrous tissue hyperplasia. The location of fibrous tissue hyperplasia was consistent with the location of the positive region of enzyme histochemical staining. Conclusion At 6 months after microwave ablation, the tissue in the ablation area of thyroid nodules is consistent with coagulative necrosis, and is still inactivated. SDH or NADPH-d enzyme histochemical staining combined with H-E staining can objectively evaluate the old ablation area.
ABSTRACT
Black ginseng (BG) has been widely used as herbal treatment for improving physiological function. In order to investigate the neuroprotective action of this herbal medicine, we examined the influence of BG on the learning and memory of rats using the Morris water maze, and we studied the effects of BG on the central cholinergic system and neural nitric oxide synthesis in the hippocampus of rats with neuronal and cognitive impairment. After middle cerebral artery occlusion was applied for 2h, the rats were administered BG (100 or 400 mgkg(-1), p.o.) daily for 2 weeks, followed by training and performance of the Morris water maze test. The rats with ischemic insults showed impaired learning and memory on the tasks. Treatment with BG produced improvement in the escape latency to find the platform. Further, the BG groups showed a reduced loss of cholinergic immunoreactivity and nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d)-positive neurons in the hippocampus compared to that of the ISC group. These results demonstrated that BG has a protective effect against ischemia-induced neuronal and cognitive impairment. Our results suggest that BG might be useful for the treatment of vascular dementia.
Subject(s)
Animals , Rats , Dementia, Vascular , Herbal Medicine , Hippocampus , Infarction, Middle Cerebral Artery , Learning , Memory , NAD , Neurons , Nitric Oxide , Panax , United NationsABSTRACT
[Objective] The aim of this study was to investigate the effects of Joksamni (ST 36) combination on NADPH-diaphorase, neuronal nitric oxide synthase (nNOS), neuropeptide Y (NPY) and vasoactive intestinal peptide (VIP) in the cerebral cortex of spontaneously hypertensive rat. <BR>[Methods] The experimental groups were divided into four groups : Normal, Joksamni (ST 36), Joksamni (ST 36) + Eumneungcheon (SP 9), and Joksamni (ST 36) + Gokji (LI 11). Needles were inserted into acupoints at the depth of 0.5 cm with basic insertion method. Electroacupuncture was done under the condition of 2 HZ electrical biphasic pulses with continuous rectangular wave lasting for 0.2 ms until the muscles produced visible contractions. Such stimulation was applied continuously for 10 minutes, 1 time every 2 days for 10 sessions of treatments. Thereafter we evaluated changes in NADPH-d positive neurons histochemically and changes in nNOS, NPY and VIP positive neurons immunohistochemically. <BR>[Results] The optical densities of NADPH-d positive neurons of the Joksamni (ST 36) + Eumneungcheon (SP 9) group in all areas of cerebral cortex and Joksamni (ST 36) + Gokji (LI 11) group in primary somatosensory cortex, visual cortex, auditory cortex, perirhinal cortex were significantly increased as compared to the Joksamni (ST 36) group. <BR>The optical densities of NADPH-d positive neurons of the Joksamni (ST 36) + Gokji (LI 11) group were sig-nificantly decreased as compared to the Joksamni (ST 36) + Eumneungcheon (SP 9) group with the exception of primary somatosensory cortex. <BR>The optical densities of nNOS positive neurons of the Joksamni (ST 36) + Eumneungcheon (SP 9) group in all areas of cerebral cortex and Joksamni (ST 36) + Gokji (LI 11) group in auditory cortex, perirhinal cortex, insular cortex were significantly increased as compared to the Joksamni (ST 36) group. The optical densities of nNOS positive neurons of the Joksamni (ST 36) + Gokji (LI 11) group were significantly decreased in all areas of cerebral cortex as compared to the Joksamni (ST 36) + Eumneungcheon (SP 9) group. <BR>The optical densities of NPY positive neurons of the Joksamni (ST 36) + Gokji (LI 11) group were signifi-cantly decreased in primary motor cortex, primary somatosensory cortex, cingulate cortex as compared to the Joksamni (ST 36) and Joksamni (ST 36) + Eumneungcheon (SP 9) groups. <BR>The optical densities of VIP positive neurons of the Joksamni (ST 36) + Eumneungcheon (SP 9) group were significantly increased in all areas of cerebral cortex except f or cingulate cortex as compared to the Joksamni (ST 36) group. The optical densities of VIP positive neurons of the Joksamni (ST 36) + Gokji (LI 11) group were significantly decreased in auditory cortex, cingulate cortex, perirhinal cortex as compared to the Joksamni (ST 36) + Gokji (LIII) group were significantly decreased in all areas of cerebral cortex as compared to the Joksamni (ST 36) + Eumneungcheon (SP 9) group. <BR>[Conclusions] The result demonstrated that electroacupuncture on Joksamni (ST 36) and its combination change the activities of the NO system and peptidergic system in the cerebral cortex of SHR and that acupoint combination is one of the important parameters for the effects.